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United States Patent | 6,031,902 |
Takahashi | February 29, 2000 |
The invention has a purpose of making the operability and functionality of a simultaneous all together communication (a broadcasting communication) good. A dealing communication system of the embodiment provides with COT 1-2 to be called with a public line, DBDLIN 1-7 connected to BD 1--1 and CLU 1-6 accommodating and being connected to COT 1-12 and DBDLIN 1-7. DB 1--1 has a structure comprising a display 2--2 for displaying the broadcasting transmission key 3-5 instructing the broadcasting transmission operation to all lines of line group previously stored and displaying the line key 2-3 instructing a transmission /reception operation on said line corresponding to DB 1--1, a hands-set 2-14 for carrying out a communication, and CPU (not shown) for executing the broadcasting transmission operation on all lines of line group in response to a one-touch operation of the broadcasting transmission key 3-5 displayed on the display 2--2, resulting in a possibility of the broadcasting communication to all lines of the line group through the hands-set.
Inventors: | Takahashi; Toshiei (Fukushima, JP) |
Assignee: | Hitachi Telecom Technologies, Ltd. (Koriyama, JP) |
Appl. No.: | 032917 |
Filed: | March 2, 1998 |
Current U.S. Class: | 379/165 |
Intern'l Class: | H04M 001/00 |
Field of Search: | 379/156,157,158,159,160,161,162,163,164,165,166 |
4536621 | Aug., 1985 | Bergen et al. | 179/99. |
5309509 | May., 1994 | Cocklin et al. | 379/165. |
5465292 | Nov., 1995 | Takahashi et al. | 379/164. |